Manufacture of hooked coupling-links



(No Model.) 2 sheetssheen 2.

. J. H. SIMPSON. y

MANUPAGTURE OP HOOKED GOUPL LINKS.

No. 845,080. Pate d July 6, 1886.

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VWTNESSESI lManufacture of Hooked Coupling-Links, of

ally merging into lower wall or side of the UNITED STATES j PATENT Orgien..

JAMES H. SIMPSON, OF PITTSBURG, PENYSYLVANIA.

MANUFACTURE OF HOOKED COUPLlNG-LINKS.

SPECIFICATION forming part of Letters Patent No. 345,080, dated July', 1886,

Application filed April 12, ISSG. v

To a/ZZ whom it may concern,.-`

Be it known that 1, J AMES H. SIMPSON, residing at Pittsburg, in t-he county of Allegheny and State of Pennsylvania, and a citizen of the United States, have invented or discovered certain new and useful Improvements in the which improvements the following is a speci Iication.

Inthe accompanying drawings, which make part of this specification, Figure 1 is a perspective view of a forged'blank used in my improvements in the manufacture of hooked coupling-links. Figs. 2 and 3 are perspective views of what I term the ronghing-out7 dies. Fig. 4 is a sectional elevation of the roughingout dies on an enlarged scale, showing the same in operation on a blank. Fig. 5 is a perspective view of the product of the rough.- ing-out dies. Fig. 6 is a similar viewof the lling-block. Fig. 7 is a perspective view of the male finishing-die. Figs. 8 and 9 are similar views of the two parts of the female iinishingdie. Fig. 10 is a sectional elevation of the finishing-dies in operation on the blank shown in Fig. 5. Fig. 11 is a perspective View of the finished hooked coupling-link. Fig. 12 is a side elevation of the blank formed in the finishing-dies.

The invention herein relates to certain improvements in the manufacture of what is known as the Eames hooked conpling-link,. whereby such parts o-f the link as are subjected to strain in use maybe formed'integral with the body of the link, thus avoiding welds, which can with difficulty be effected in steel; and to this end the invention consists in the apparatus and method, substantially as here inafter described and claimed.

In carrying out my invention I first forge or shape in any suitable manner the block A, (see Fig. 1,) having approximately the shape of the finished link. This block, after being properly heated, is placed in the matrix 1 of the female roughing-die 2. vIn the bottom of the matrix 1 is formed arecess,3,having its side walls rounded at their upper end, and graduinatriX, the contour of said wall or side being substantially the same as the under side of the block A. The male die 4 has a plain operative face, 5, adapted to cover the matrix 1 Scrin1No.l98,5Gl. (No model.)

when in position, and is provided nearits end with the projecting punches- 6 and 7. The punch 6 is of such a shape and size that when forced into the block A it will form a recess, 8, said recess being subsequently changed into a slot, as will be hereinafter described. rIhe punch 7, which is practically a continuation and vertical enlargement of the punch 6, forces, when the die 4 is brought down, a portion of the metal of the block intothe recess 8 in the female die, thus forming a projection or lug, 9, which is subsequently nished Vinto a hook shape. The partial formation of the slot and hook are the principal functions of the roughing-out dies, although they do effect a partial rounding up ortinishing of the outer surface or walls of the block, as shown in'Fig. 5. rlhedie 4 is provided with a guiding projection, 10, at one end. adapted to lit in a corresponding transverse recess, 11, in the female die 2, as shown, the inner wall of the projection being curved, so as to impart the desired contour to the tail of the block A.

As will be seen by'an inspection of Figs. 4 and 5, the punch 7 forms a recess or cavity, 12, in the block B, in the rear of the recess 8, and just above the projection or lug 9, said cavity being practically a prolongation ofthe recess S. Before heating the block or blank 13,' preparatory to its final shaping, the cavity 12 is pluggedor filled by the plug 13, (see Fig. 6,) said plug being subsequently incorporated in the body of the link. After being properly heated the block or blank B is placed in the die formed by the parts 14 and 15, Figs. 8 and 9. In the face of the part or section 14 is formed a recess, 16, corresponding in outline to the link to be formed, and in this recess is located the projection 17, adapted, in connection with acorresponding projection on the male die, hereinafter referred to, to forni a slot in the front end of the link. The surface of the recess between its outer walls and the projection 17 is curved, as shown, to impart a rounding surface to the under side of the link, (see Fig. 11,.) and behind the projection 17 the bottom of the recess curves downward, as shown at 18, to impart the desired shape to the under side of the link. In the rear of the projection 17 a recess, 19, is formed in the section 14, said recess forming, in connection with a recess, 20, in the part 15, a cavity adapted IOO to cause the lug or projection 9 to assume the required hook shape.

The recess or matrix 21 in the part 15 is a continuation or a portion of the matrix 16 in the part 14, and the part 22 of the bottom of said matrix is a continuation of the downwardly-curving part 18 of the bottom of the matrix 16. At the tail end of the matrix 21 the bottom thereof is made flat, as shown at 23 in Figs. 9 and 10, from the surface of which projects the square lug 24, adapted to form a correspondinglyshaped recess in the completed link C, for the reception of a nut.

In the male die 26 (see Fig. 7) is formed a matrix-cavity, 27, of a shape corresponding to the shape of the upper side of the completed link C, Fig. 11. From this matrix-cavity projects the punch 28, constructed,in connection with the projection 17, to form the-slot 29 in the completed link, and also to impart the sloping surface 30 at the end of said slot. In therear of the punch 28 is formed another punch, 31, constructed to form a recess, 32, in the completed link, for the reception of the link-operating chain. At the rear end ofthis punch 31 is formed a projection, 33, having a attencd or partially-rounded operative face for forming a recess at the end of the link,for the attachment of the operatingchain. In some forms of this class of links therrecess 32 is unnecessary, in ,which case all of the punch 31, with the exception ofthepart 33. is omitted.

As the rear wall of the recess 20 is undercut, so as to impart the desired hook shape to the lug 9, it is necessary to form the female -nishing-die in two parts or sections, 14 and 15, in order to remove the finished link; but, if desired, the rear wall of the recess 20 may `be made vertical, and the lug be bent to the required shape by ahammer after the removal of the link from the die, in which case the parts 14 and 15 are made in one piece.

A swell or enlargement, 34, is formed on the under and upper side of the blank D, Fig. 12, and a hole, 35, is bored transversely through the blank inline with said 'enlargements,wfhich are forced into the body of the blank by hammers. This operation produces a flattening of the sides of the hole 35 adjacent to the enlargements 34, and an elongation in the direction of the longitudinal axis of the blank thus produces an oval opening, 36, (see Fig. 11,) which is finished by forcing an oval mandrel through the flattened hole.

I claim herein as my invention-- 1. As an improvement in the art of manufacturing hooked coupling-links, the hereindescribed method,which consists in forming a recess in and a lug on a partially-shaped blank by stamping the saine in suitably-constructed dies, and then slotting and forming a hook, and finally shaping said blank in another set ofdies, substantially as set forth.

2. As an improvement in the art .of manufacturing hooked coupling-links, the hereindescribed method, which consists in forming a lng on a suitably-shaped blank by forcing outward a portion of the metal of the blank, filling the recess or cavity produced by said operation with a metal plug, and finally shaping the lug to a hook form, and incorporating the filling-plug with the body of the blank, substantially as set forth.

3. The die 2, provided with the matrix 1 and recess 3, in combination with the die 4, provided with the projections or punches 6 and 7, the operative lfaces of said diesbeing shaped to approximately correspond with the shape or contour ofthe upper and under faces of the link to be formed, substantially as set forth.

4. The female finishing-die composed of the parts 14 and l5, the kpart 14 being provided with the projection 17 and recess 19, and the part 15 being provided with the recess 20, in combination with the male die 26, provided with the projections or punches 28 and 33, the matrices of said dies being constructed to cor- 'respond with the shape or contour of the link to be formed, substantially as set forth.

In testimonywhereofI have hereunto set my hand.

JAMES SIMPSON.

Witnesses:

DARWIN S. WoLooTT, R. H. WITTLEsEY. 

